Table 2

Age, sex and income and utilisation of three or more psychotropic drugs among the
study participants (n = 384346).

Utilisation of three or more psychotropics, No./Total N (%)†

Odds Ratio (95% CI)‡

p-value

Adjusted Odds Ratio (95% CI)§

p-value

Age

75-79

22729/111787 (20.3)

1 (Reference)

1 (Reference)

80-84

26227/115802 (22.7)

1.12 (1.09-1.14)

< 0.001

1.09 (1.07-1.11)

< 0.001

85+

36226/137798 (26.3)

1.25 (1.22-1.27)

< 0.001

1.19 (1.16-1.21)

< 0.001

Sex

Men

24671/112602 (21.9)

1 (Reference)

1 (Reference)

Women

60511/252786 (23.9)

1.17 (1.15-1.19)

< 0.001

1.14 (1.12-1.16)

< 0.001

Income*

High

25959/121784 (21.3)

1 (Reference)

1 (Reference)

Middle

29087/124009 (23.5)

1.11 (1.09-1.13)

< 0.001

1.06 (1.04-1.08)

< 0.001

Low

30075/119233 (25.2)

1.19 (1.17-1.21)

< 0.001

1.12 (1.10-1.14)

< 0.001

* Family disposable income for year 2005, adjusted for family size.

† The denominator was adjusted according to the proportion of days the population
was resident in the country and alive during 2006

‡ Adjusted for the proportion of days resident in the country and alive during 2006

§ Adjusted for age, sex, income, country of birth, proportion of days resident in
the country and alive during 2006, and number of unique nonpsychotropic drug substances
purchased during the study period.